JP3129372B2 - Airway wall shielding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a model of how a gas or heat discharged from a chimney or a building constructed on the ground is diffused according to the topography including the building on the ground. The present invention relates to a wind path wall shielding device applied to a gas diffusion test device for performing a quantitative test by using a gas diffusion test device.

[0002]

2. Description of the Related Art FIGS. 6 to 8 show diagrams in which a conventional air passage wall shielding device is attached to a gas diffusion test device. 6 is an air path side view, FIG. 7 is an air path front view, and FIG. 8 is an air path plan view. Smoke exhaust from chimneys and stack stacks, or heat from cooling towers etc.
It diffuses along the wind, but to simulate such natural diffusion phenomena in a laboratory wind tunnel, a structure that emits diffusion gas such as a chimney (hereinafter referred to as a chimney) ), Along with the mountains, rivers and buildings near the chimney are placed in the wind tunnel as a so-called topographic model, and a special gas is discharged from the chimney model, and the airflow simulates the natural wind in the wind tunnel. At the required location on the terrain model, the diffusion gas flowing over the terrain model is sucked, and the spread of the gas on the terrain model is observed and measured by a dyeing test, suction by traverse, gas analysis, etc. I have. Except for special cases, the terrain model to be installed in the wind tunnel is made into a circular terrain model and set in the wind tunnel in consideration of the effective use of the model area, as shown in FIG. There are the following two methods for this setting.

[0003] (1) The wind direction is divided into 16 to 32 directions, one wind direction is selected from the directions, and the wind direction of the terrain model is fixed in the wind tunnel so as to be arranged in the wind tunnel.

[0004] (2) A circular terrain model is arranged in a wind tunnel so as to be able to rotate continuously using a rotating device. That is, the wind direction of the circular model at the time of the experiment can be changed every moment by using a rotating device.

FIGS. 6 to 8 show the above (1)
This sets a circular terrain model in the wind tunnel. In these figures, 01 is a blower, 02 is an airflow,
03 is a measurement room, 04 is a floor surface of the measurement room 03, 05 is a turntable, 06 is a circular terrain model, 07 is a vertical rotation axis,
08 is a support member provided annularly along the outer periphery of the lower surface of the turntable 05, 09 is a circular track, and 010 is a computer. Also, 011 is a drive motor for rotating the turntable 05, 012 is a drive roller, 013 is a chimney model,
014 is the tracer gas discharged from the chimney model, 015
Indicates a number of gas inlets provided on the surface of the terrain model 06, 016
Is a gas sampling tube, 017 is a gas suction device, 018
Is a flow controller for the tracer gas 014, and 019 is a gas cylinder for tracer gas. 020 is a blower 01
And drive control device for drive motor 011, 021, 02
2 is a cable and 023 is an external storage device. Also, 0
Reference numeral 24 denotes a shielding plate for sealing between the side wall 025 of the measurement room 03 and the surface of the terrain model 06 so that the airflow 02 does not leak. This shielding plate 024 is manufactured for each wind direction because the cross section of the topography model 06 on the shielding surface differs depending on each wind direction of the topography model 06. Further, reference numeral 026 denotes a mounting seat for mounting the shielding plate 024, which is provided at the lower end of the air path side wall 025. 027 is seat plate 0
It is a hole for connection between 26 and the shielding plate 024.

In the apparatus configured as described above, the turntable 05 is rotated by the drive motor 011 in order to set the terrain model 06 to a predetermined wind direction. Driving of the drive motor 011 can be performed by transferring data of a predetermined wind direction from the computer 010 to the drive control device 020, converting the data, and transmitting a drive signal from the drive control device 020 to the drive motor 011 via the cable 022. . The terrain model 06 is set to a predetermined wind direction. When the rotation of the turntable 05 is completed, the drive motor 011 is stopped. Next, there is a gap between the surface of the terrain model 06 and the side wall 025 of the air path, so that shielding is performed. As described above, the shielding plate 024 whose lower end is shaped in accordance with the shielding partial cross-sectional shape 028 located immediately below the airway side wall 025 in the predetermined wind direction of the terrain model 06 is used as described above. It is performed by fixedly disposing it on the mounting seat 026. As described above, the terrain model 06 is in the wind path 03 with the predetermined wind direction.
And the experiment preparation is completed.

In the experiment, first, predetermined wind speed data is given to the computer 010, and this data is sent to the drive control device 02.
0, and the drive signal from the drive control device 020 is
By transferring to the blower 01 via the cable 21, the airflow 02 generated by the blower 01 and rectified into a steady flow flows through the measurement chamber 03. Next, from the chimney model 013, the tracer gas 014 in the gas cylinder 019 is extracted.
Is controlled 9 by the flow control device 018 to a constant amount and is discharged. The tracer gas 014 is dispersed at a predetermined position on the surface of the terrain model 06 on the turntable 05, and is provided by a gas suction port 015 to a gas sampling pipe 016 via a flexible pipe by a gas suction device 017. It is sucked. The suction state of the tracer gas 014 at the gas suction port 015 installation location can be detected by performing a predetermined method to quantitatively analyze the absorption liquid in the gas sampling pipe 016 after suction for a predetermined time. As is apparent from the above description, the conventional shield plate 024 that seals the gap between the side wall of the wind path and the surface of the terrain model has the following problems.

(1) As can be understood from the contour lines in FIG. 8, the cross-sectional shape 028 of the terrain model 06 in each wind direction has a completely different shape. In accordance with the number of wind directions of the model, it is necessary to manufacture a shielding plate 024 shaped so that the lower end corresponds to the shielding partial sectional shape 028.

(2) Every time the wind direction of the terrain model 06 is changed, it is necessary to remove and attach the shielding plate 024. As a result, the experiment efficiency is not favorable and the cost is increased.

(3) Further, in an experiment in which the wind direction is continuously changed, the cross-sectional shape of the shielded portion changes every moment as the wind direction of the terrain model 06 changes. Cannot be shielded, and the measurement accuracy deteriorates. In other words, when a gap is generated between the surface of the terrain model 06 and the lower end of the shielding plate 024, the airflow generated by the gap causes an airflow different from the airflow generated in the terrain model wind direction set on the terrain model 06, thereby reducing the measurement accuracy. Deterioration occurs.

(4) In order to maintain the measurement accuracy, in a test using a terrain model having a size equal to or smaller than the width of the wind path, the scale of the terrain model or the range of the terrain model is limited, and a problem arises in the measurement accuracy from this aspect. .

[0012]

SUMMARY OF THE INVENTION Therefore, the present invention
Eliminates the above-mentioned problems of sealing by the conventional shielding plate, can maintain the measurement accuracy of gas diffusion test without imposing unreasonable restrictions on the production of terrain models, and does not impair the experimental efficiency, low cost It is another object of the present invention to provide an airway wall shielding device capable of performing a test in which the wind direction of a terrain model is continuously changed without lowering measurement accuracy.

[0013]

Therefore, the wind path wall shielding device of the present invention has the following means.

(1) In order to close a gap formed between the wind path wall formed above the terrain model and the surface of the terrain model,
The side edges overlap each other and are airtight, and
A plurality of partition plates, each of which can move up and down independently, are provided.

(2) An optical sensor arranged above the terrain model and capable of detecting the height (undulating shape) from the reference point of the terrain model disposed below is provided.

(3) A rotation angle sensor having a terrain model disposed on the upper surface and capable of detecting a rotation angle from a reference of the turntable is provided.

(4) The height signal of the terrain model from the optical sensor and the rotation angle signal of the turntable from the rotation angle sensor are input, and the height of the terrain model when reaching just below the wind path wall is turned. A storage device for recording in advance was provided in association with the rotation angle of the table. In this case, if the optical sensor is installed to read the undulating shape of the terrain model located directly below the partition plate, make sure that the rotation angle of the turntable and the height of the terrain model from the optical sensor are collected as they are. did. However, when installing an optical sensor at a position away from immediately below the partition plate to read the undulating shape of the terrain model,
The undulation shape of the terrain model when the undulation shape of the terrain model read by the optical sensor reaches immediately below the partition plate by the rotation of the turntable is calculated and recorded.

(5) A settable rotation angle signal of the turntable corresponding to the wind direction of the terrain model to be measured is input, and the height of the terrain model is retrieved from the rotation angle corresponding to the signal by a signal from the storage device. And a control unit for outputting an operation signal for setting the lower end of the partition plate up and down to the height thereof.

(6) The lower end of the partition plate is formed into a shape corresponding to the surface shape of the terrain model based on the operation signal from the control unit,
A drive unit for vertically moving the partition plate was provided so that a gap between the lower end of the partition plate and the surface of the terrain model was reduced.

[0020]

According to the air path wall shielding device of the present invention, a terrain model mounted on a turntable in advance can be
Rotate by 0 °, read the height of the terrain model when passing through the lower part of the partition plate in the wind direction to be tested by the optical sensor, and store it in correspondence with the terrain model rotation angle detected by the turntable rotation angle sensor. To be recorded. Next, the partition plate is moved up and down such that the lower ends of the walls formed on both sides of the terrain model in a predetermined wind direction of the terrain model are formed along the surface of the terrain model. The vertical movement of the partition plate is performed by inputting the terrain model undulation shape data collected in the storage device to the control unit, searching the terrain model undulation shape data in the predetermined wind direction of the terrain model by the control unit, and operating based on the data. The signal is output to the driver, and the operation is performed by the driver. As described above, the gap between the surface of the terrain model and the wind path walls on both sides of the terrain model can be shielded by the partition plate. Not only when the terrain model is fixed in a certain wind direction, but also in experiments where the terrain model is rotated every moment during the experiment, the height of the partition plate can be controlled in real time according to the surface shape of the terrain model. Become.

[0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an airway wall shielding device according to an embodiment of the present invention. 1 to 5 are views showing an embodiment of the present invention. FIG. 1 is a plan view of an air passage, FIG. 2 is an AA arrow view and a device configuration diagram of FIG. 1, and FIG. 4 is a plan view of the partition plate, and FIG. 5 is a front view of FIG. The components having the same reference numerals as those of the conventional example are the same as or similar to those of the conventional example, and therefore description thereof is omitted. In the figure, 28-
Reference numeral 36 denotes a partition plate installed below the fixed side wall 25 of the air path formed above the terrain model 06, and a driving unit thereof. 28 is a short fence-shaped vertically movable partition plate for shielding the inside and outside of the air passage, and 29 is a vertically movable partition plate 28 (up and down).
Lower) a support rod, 30 is a roller for contacting the surface of the terrain model, 31 is a brush attached to the lower part of the partition plate 28, 32 is a bearing for smoothly driving the support rod 29, and 33 is a motor as a drive unit , 34 are pulleys, one of which is directly connected to the output shaft of the motor 33. Reference numeral 35 denotes a transmission belt, on which a partition plate 28 is attached. Reference numeral 36 denotes a support plate protruding from the side surface of the fixed side wall 25 for mounting the motor 33, the partition plate 28, the support rod 29, and the like.

Reference numerals 37 and 38 denote control units for driving the partition plate 28. 37-1 is a computer for controlling the vertical height position of the partition plate 28, 37-2 is a signal supply device for supplying an operation signal to the motor 33, 37-3 is an online communication device with another control device, 38 is Communication cable.

Reference numerals 39 to 42 denote an optical sensor and a data acquisition device for reading the height of the terrain model 06, that is, the undulations of the terrain model 06. Reference numeral 39 denotes a plurality of optical sensors installed above the terrain model 06, which are mounted in the windward direction (radial direction) from the center of the terrain model 06 at the same pitch as the mounting pitch of the partition plate 28. Reference numeral 40 denotes a support fitting on which the optical sensor 39 is mounted, which can slide the ceiling of the personality sideways as shown by the arrow b in FIG. 41-1 is a computer for collecting read data, 41-2 is a data storage device, 41-3 is A / D
A converter, 41-4 is an online communication device with another control device including a control unit, and 42 is a communication cable.

Reference numerals 43 to 46 denote a rotation angle (movement amount) reading device of the terrain model 6 and a rotation drive control device of the terrain model 06. 43 is a rotary encoder sensor as a rotation angle sensor for reading the rotation angle of the turntable 05,
44-1 is a computer for collecting the read rotation angle data of the turntable 05 and for controlling the rotation of the turntable 05, 44-2 is a counter of the encoder 43, and 44-3 is a signal supply device to the turntable driving motor 011. ,
44-4 is an online communication device, 45 and 46 are communication cables, and 47 is a communication cable between the online communication devices.

In this embodiment configured as described above,
First, reading of the undulation (height) of the terrain model 06 will be described. The optical sensor 39 and the supporting bracket 40 supporting the optical sensor 39 are set at the center of the air path as shown in FIG. In this state, the optical sensor 39 is fixedly arranged at the same pitch as the partition plate 28 on the windward side from the center of the terrain model 06. In this state, the turntable 05 is rotated in the direction of arrow a at a slow speed. The undulation (height) of the terrain model 06 located immediately below each optical sensor 39 changes moment by moment.
And read this data in real time
The data is collected in the storage device 41-2 via 1-1. At the same time, the rotation angle of the terrain model 06 is also measured by the rotation angle sensor 43 and collected by the computer 44-1. That is, by rotating the terrain model 06 one turn in this way, the collection of the undulation (height) data of the terrain model 6 and the terrain model rotation angle data at that time at the location where the partition plate 28 is located is completed. I do. In addition, the partition plate 28 at this time is lifted up so that the terrain model 06 does not collide with all of them.

Next, in an actual experiment, this partition plate 2
A method for causing the 8 to function as a shielding device will be described.
First, the case where the terrain model 06 is rotated and fixedly arranged at a predetermined wind direction will be described. The partition plates 28 are all
Raise by 3 In this state, the computer 44-1 and the signal supply device 44-3 rotate the drive motor 011 of the turntable 05 so that the wind direction becomes a predetermined wind direction. Since the rotation angle at this time is known, the undulation (height) of the terrain model 06 at each partition plate 28 position at this rotation angle is known.
The data is transmitted from the storage device 41-2 to the computer 37-1 via the computer 41-1. Based on this data, an operation signal is sent from the signal supply device 37-2 to the drive motor 33 of each partition plate 28. Thereby, each partition plate 2
The lower end of 8 operates up to the surface of the terrain model 06 and is fixed at that position. As a result, the gap between the side walls of the air passage and the topographical model 06 is completely shielded by the partition plate 28.

Next, a case where an experiment is performed while rotating the terrain model 06 will be described. In this case, the partition plate 28
Must always shield both side walls of the airway,
In accordance with the rotation of the terrain model 06, the partition plate 28
6 Continuous operation corresponding to undulation (height) (up and down)
Have to do. Since the rotation range of the terrain model 06 is known, the angle data in this range and the undulation (height) data of the terrain model 06 at the position of each partition plate 28 at that time are collected in advance as described above. ing. This data is transferred to the computer 37-1, and the angle data that changes every moment and the undulation (height) data of the terrain model 6 at that time are filed. If the rotation of the terrain model 06 is started in this state, the angle data that changes every moment and the corresponding undulation (height) data of the terrain model 6 are transmitted from the computer 37-1 to the signal supply device 37-2. Then, the motor 33 for driving each partition plate 28 is operated. Thus, it is possible to control the position of the partition plate 28 in accordance with the terrain that changes every moment. That is, terrain model 0
Even in the experiment in which 6 rotates continuously, it is possible to completely shield both side walls of the air path.

[0028]

As described above, according to the wind path wall shielding apparatus of the present invention, the configuration described in the claims makes it possible to: (1) provide a completely shielded air path wall corresponding to countless wind directions; Because it can be formed, it is not necessary to manufacture many shield plates corresponding to the wind direction of the terrain model.
Eliminating the removal work also improves the efficiency of experiment preparation and reduces costs.

(2) Even in an experiment in which the model is continuously rotated, the shape of the shielding portion can be changed in accordance with the change in the surface shape of the terrain model that changes every moment. It is complete and the experimental accuracy is improved. Also,
The terrain model is not limited to the width of the wind path, so the range can be expanded according to the size of the wind tunnel, and the accuracy of experiments from this aspect is also improved.

[Brief description of the drawings]

FIG. 1 is a plan view of an air path provided in an embodiment of an air path wall shielding device of the present invention.

FIG. 2 is a side view taken along the line AA of FIG. 1 and a block diagram of devices constituting the embodiment of FIG.

FIG. 3 is a front view of the air path in FIG. 1;

FIG. 4 is a detailed plan view of a partition plate portion of FIG. 1;

FIG. 5 is a front view of FIG. 4;

FIG. 6 is a side view showing a conventional air path and a view showing a measuring device.

FIG. 7 is a front view of the air path in FIG. 6;

FIG. 8 is a plan view of the air path in FIG. 6;

[Description of Signs] 05 Turntable 06 Terrain model 25 Fixed side wall 28 Partition plate 29 Support rod 30 Roller 31 Brush 32 Bearing 33 Motor as drive unit 34 Pulley 35 Transmission belt 36 Support plate 37 Control unit 37-1 Computer 37-2 Operating signal supply device to partition plate drive motor 37-3 Online communication device 38, 42, 45, 46, 47 Communication cable 39 Optical sensor 40 Optical sensor support bracket 41 Storage device 41-1 Recording computer 41-2 Data storage Device 41-3 A / D converter 41-4 Online communication device 43 Rotary encoder as rotation angle sensor 44-1 Computer 44-2 Counter 44-3 Signal supply device to turntable drive motor 44-4 Online communication device

Claims (1)

(57) [Claims] 1. A wind path wall shielding device for shielding a gap formed between a wall of an air path formed above a terrain model mounted on an upper surface of a turntable rotatable in a horizontal plane and the surface of the terrain model. In the above, a plurality of partitioning plates which are arranged in a row by overlapping side ends adjacent to both sides of the air path and can be individually moved up and down, and an optical sensor arranged above the terrain model and detecting the height of the terrain model A rotation angle sensor for detecting a rotation angle of the turntable; and an output signal from the optical sensor and the rotation angle sensor, and the height of the terrain model corresponding to the rotation angle of the turntable is previously recorded. A storage device, a control unit that inputs a rotation angle signal of the storage device and the turntable that performs measurement, and outputs an operation signal for moving the partition plate up and down, and the partition plate according to an operation signal from the control unit. And a drive unit for moving the vertical movement in accordance with the height of the terrain model.